401 research outputs found
Dimensionally Stabilized, Very Low Density Fiberboard
In this study, fiberboards with a specific gravity ranging from 0.2 to 0.5 were made using acetylated, steam-treated, and untreated fiber. In all boards, dimensional stability increased as specific gravity decreased from 0.5 to 0.2. Fiberboards made from acetylated fiber were more dimensionally stable than boards made from steam-treated fiber at all specific gravity levels tested. Steam-treated fiberboards resulted in a 15% weight loss of hemicelluloses and some loss of lignin and extractives. Boards with a specific gravity of 0.2 had a low modulus value, which was probably due to poor adhesion between fibers
Recognition of Objects Using Modified Coded Boundary Representation (MCBR) Method(Physics, Process, Instruments & Measurements)
Object Recognition System for Incomplete Image Data : Application of Coded Boundary Representation (Report II)(Physics, Process, Instruments & Measurements)
Experimental cruise for sea spray generation in MR18-05C
The Tenth Symposium on Polar Science/Ordinary sessions: [OM] Polar Meteorology and Glaciology, Wed. 4 Dec. / Entrance Hall (1st floor) , National Institute of Polar Researc
Fixation of Compressed Wood Using Melamine-Formaldehyde Resin
Methods to maximize wood hardness and dimensional stability include various combinations of compression, heating, and chemical treatment. In this study, wood was treated with increasing concentrations of a low molecular weight, water-soluble melamine-formaldehyde resin solution (mol wt 380) and compressed while heated. This method achieved a maximum bulking efficiency of 5% and an antishrink efficiency of 45%, showing that the chemical had not completely penetrated the cell wall. Once the wood was treated, its ability to retain the compressed state was tested by immersing wood specimens in water at different temperatures. Specimens treated with an 8% resin solution retained almost complete fixation when soaked in room-temperature water, while those treated with a 25% solution retained fixation in boiling water. Moreover, a 25% solution of resin and a compression of 54% increased hardness from 0.48 to 0.72 MPa
Spin-Hall effect: Back to the Beginning on a Higher Level
The phenomena of the spin-Hall effect, initially proposed over three decades
ago in the context of asymmetric Mott skew scattering, was revived recently by
the proposal of a possible intrinsic spin-Hall effect originating from a
strongly spin-orbit coupled band structure. This new proposal has generated an
extensive debate and controversy over the past two years. The purpose of this
workshop, held at the Asian Pacific Center for Theoretical Physics, was to
bring together many of the leading groups in this field to resolve such issues
and identify future challenges. We offer this short summary to clarify the now
settled issues on some of the more controversial aspects of the debate and help
refocus the research efforts in new and important avenues.Comment: 4 pages, Summary of the APCTP Workshop on the Spin-Hall Effect and
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